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- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
Speed Sensor - G50 Gearbox
Restore accurate vehicle speed measurement and reliable
speedometer operation with this OE Match Speed Sensor for Porsche
911 Carrera models equipped with the G50 gearbox from 1987-1989 and 1989 Porsche 911 turbo models.
Fits:
Mounted on the G50 transmission, the speed sensor monitors gearbox output shaft rotation and generates an electronic signal that is used by the vehicle's speedometer and associated control systems. As one of the key components within the vehicle speed monitoring system, a correctly functioning speed sensor is essential for accurate speed indication and proper operation of related electrical systems.
Manufactured to OE specifications, this direct replacement sensor provides dependable performance and factory-correct fitment for maintenance, fault diagnosis and restoration projects.
What Does the G50 Speed Sensor Do?
The speed sensor measures the rotational speed of the gearbox output shaft and converts this information into an electrical signal.
Its primary functions include:
- Monitoring vehicle road speed
- Operating the speedometer
- Providing vehicle speed information
- Supporting odometer functionality
- Assisting vehicle electrical systems
- Delivering accurate speed readings
- Maintaining factory instrumentation performance
Without a functioning speed sensor, the vehicle's speed indication system cannot operate correctly.
Why Do Speed Sensors Fail?
Speed sensors are exposed to heat, vibration, moisture and years of continuous operation.
Common causes of failure include:
- Internal electronic deterioration
- Heat-related ageing
- Wiring damage
- Corrosion of terminals
- Moisture ingress
- Gearbox contamination
- Physical impact damage
- Age-related component failure
As the sensor ages, signal quality can deteriorate, eventually leading to inaccurate readings or complete failure.
Symptoms of a Faulty Speed Sensor
Common warning signs include:
- Inoperative speedometer
- Erratic speedometer readings
- Intermittent speed display
- Odometer malfunction
- Speedometer needle fluctuation
- Electrical fault diagnosis issues
- Loss of vehicle speed signal
- Dashboard instrumentation faults
In many cases, the speedometer may work intermittently before complete sensor failure occurs.
When Should the Speed Sensor Be Replaced?
Replacement is recommended when:
Diagnosing
speedometer faults
Speed
readings become erratic
The
speedometer stops working
Replacing
damaged wiring
Carrying
out gearbox repairs
Performing
preventative maintenance
Restoring
a Porsche 911 or 911 turbo
Electrical
testing confirms sensor failure
Many Porsche specialists replace ageing sensors when undertaking transmission refurbishment work.
Why Replacement Matters
A functioning speed sensor is important for both safety and vehicle usability.
Benefits of replacement include:
- Accurate speedometer readings
- Reliable odometer operation
- Improved electrical system functionality
- Elimination of intermittent faults
- Enhanced driving confidence
- Reliable vehicle speed monitoring
- Improved restoration quality
- Factory-correct performance
For classic G50-equipped Porsche models, maintaining reliable instrumentation is an important part of preserving the driving experience.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91160691001
The product you are viewing cross references to these numbers
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
- Porsche 970.1 Panamera V6 3.6L 2WD 2009-13
- Porsche 970.1 Panamera 4 V6 3.6L 4WD 2009-13
- Porsche 970.1 Panamera S V8 4.8L 2009-13
- Porsche 970.1 Panamera 4S V8 4.8L 2009-13
- Porsche 970.1 Panamera GTS V8 4.8L 2011-13
- Porsche 970.2 Panamera V6 3.6L 2WD (310Hp) 2014-16
- Porsche 970.2 Panamera 4 V6 3.6L 4WD (310Hp) 2014-16
- Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD (420Hp) 2014-16
- Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD Executive 2014-16
- Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD (420Hp) 2014-16
- Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD Executive 2014-16
- Porsche 970.2 Panamera GTS V8 4.8L 4WD (440Hp) 2014-16
Fits:
For cars with PDK transmission
Porsche 987.2 Boxster 2009-12 - Gearbox: CG200 / CG220
Porsche 987C.2 Cayman 2009-12
Porsche 981 Boxster 2012-16 - Gearbox: CG205 / CG225
Porsche 997.2 Carrera 2009-12 - Gearbox: CG100 / CG130
Porsche 970 Panamera / S 2010-16 - Gearbox: 7-speed - C7000 / C7005 / C7001
Click 'Zoom in' for large parts diagram.
Diagram ref no 20
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9G130738506
The product you are viewing cross references to these numbers
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
- Porsche 970.1 Panamera V6 3.6L 2WD 2009-13
- Porsche 970.1 Panamera 4 V6 3.6L 4WD 2009-13
- Porsche 970.1 Panamera S V8 4.8L 2009-13
- Porsche 970.1 Panamera 4S V8 4.8L 2009-13
- Porsche 970.1 Panamera GTS V8 4.8L 2011-13
- Porsche 970.2 Panamera V6 3.6L 2WD (310Hp) 2014-16
- Porsche 970.2 Panamera 4 V6 3.6L 4WD (310Hp) 2014-16
- Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD (420Hp) 2014-16
- Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD Executive 2014-16
- Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD (420Hp) 2014-16
- Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD Executive 2014-16
- Porsche 970.2 Panamera GTS V8 4.8L 4WD (440Hp) 2014-16
Fits:
For cars with PDK transmission
Porsche 987.2 Boxster 2009-12 - Gearbox: CG200 / CG220
Porsche 987C.2 Cayman 2009-12
Porsche 981 Boxster 2012-16 - Gearbox: CG205 / CG225
Porsche 997.2 Carrera 2009-12 - Gearbox: CG100 / CG130
Porsche 970 Panamera / S 2010-16 - Gearbox: 7-speed - C7000 / C7005 / C7001
Click 'Zoom in' for large parts diagram.
Diagram ref no 20
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9G130738506
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
The Tiptronic Gearbox Inductive Sensor – Input Side is a genuine Porsche transmission component designed to monitor the rotational speed of the gearbox input shaft. Using inductive sensing technology, this sensor sends precise speed data to the transmission control unit (TCU), enabling accurate shift timing and proper operation of the Tiptronic automatic transmission system.
Fits:
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
Diagram Ref No 2
What This Product Does:
- Measuring the rotational speed of the gearbox input shaft
- Sending real-time speed data to the transmission control unit
- Helping determine correct gear selection and shift timing
- Supporting smooth and responsive automatic gear changes
- Assisting transmission management systems in maintaining optimal performance
Symptoms Of Wear Or Failure:
- Transmission warning light on the dashboard
- Harsh or erratic gear changes
- Delayed gear engagement
- Gearbox entering limp mode
- Incorrect gear selection
- Diagnostic fault codes related to transmission speed sensors
Why Replacement Matters:
- Restore smooth and accurate gear shifting
- Prevent gearbox limp mode activation
- Maintain proper Tiptronic transmission performance
- Protect internal transmission components
- Avoid costly gearbox repairs
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98632560800
The product you are viewing cross references to these numbers